Bicycle frame



FIG. 1 is a top plan view of a bicycle frame showing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof, it being understood thatthe broken lines are for illustrative purposes only, and form part ofthe claimed design; and,

FIG. 5 is a left side elevation view of FIG. 4.

The ornamental design for a bicycle frame, as shown and described.